Changing your days, or sitting out

Something came up. Text the day you need to drop and you stay in for the rest.

1. Text the day you cannot make. You stay in for every other day you picked.
2. Need the whole week off? Text I'm out.
3. Text your days back any time to jump straight back in.
4. If you drop after the groups are set, your spot goes to the next man in line.